The high school wrestler was diagnosed with the flu last Thursday. His aunt told WXIN that she called to check on him the next day, and when she didn't get a response, she came home to find him dead in the garage.

"Had I known this issue, I would've never given it to him," said Jackie Ray, Charlie's aunt and legal guardian.

The warning label on Tamiflu states that pediatric patients may be at an increased risk of confusion or abnormal behavior.

Doctors say medication may cause a different reaction in every person, but with a flu shot not as effective as in past years, there aren't many other treatments available.

"You don't have a lot of other options as far as treating the flu except for Tamiflu," said Dr. Jason Henney with St. Vincent's Hospital. Henney said he hasn't seen any patients with extreme Tamiflu side effects such as psychosis or acting delusional.

According to a GoFundMe page for Harp, his family plans to hold his funeral service on Thursday.